Dave from Nj writes
PT 221L Residual Aerosol is labeled to kill wood wasps, but not hornets. This is a non-selective insecticide (lambda-cyhalothrin), so it would affect these insects if you were able to contact them, however it does not offer the quick knockdown that would be preferred for flying, stinging insects. We do sell an excellent Wasp and Hornet Control Kit which contains the ready-to-use Wasp-X and Temprid SC. The Wasp-X will have a fast kill than something like the PT 221L, plus it has a unique foaming action to expand and cover nests and residual activity. Temprid SC is a liquid concentrate that is diluted with water and applied with a pump sprayer in areas where insects may be likely to enter the structure. Please see our Wasp Pest Guide for more tips and information about this pest.
Answer last updated on: 02/12/2016
